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TLCAWS — Adjustable Wall Support

How to Specify

Using tables from the National Fuel Gas Code or our Sizing & Application Guide, determine the diameter of venting required. The Sizing & Application Guide also offers tips on good design including multi-appliance system sizing and design. The System Design and Installation Guide is an additional resource.

TLCAWS — Adjustable Wall Support


  • Used to support the chimney on a through-the-wall installation.
  • 5” to 8” sizes include top plate, side brackets, hardware, non-twist-lock insulated tee cap, and a long L-bracket to hold tee cap in place.
  • 10” to 14” sizes do not include the cap. Use tee cap packaged with tee.
  • 2” to 6” clearance away from wall.
  • 5” to 8” sizes support between 30feet and 74 feet ofchimney, based on size and orientation. Seeinstructions for specific heights.
  • 10” to 14” sizes support up to 40feet of chimney.
  • 12”to 14” sizes are nonadjustable supports.

Non-Twist-Lock Insulated Tee Cap (5” to 8” sizes) L-Bracket (5” to 8” sizes)

AV_TLCAWS_1Adjustable Wall Support

Available sizes (inches)

5TLCAWS5"1210 5/818 7/84
6TLCAWS6"1210 5/818 7/84
7TLCAWS7"1311 5/820 1/24
8TLCAWS8"1412 5/821 7/84
10TLCAWS10"1614 5/825 1/44
12TLCAWS12"1916 1/223Nonadjustable
14TLCAWS14"2118 1/227Nonadjustable